There is no sharp line as to geographical regions. The calendar should stay useful, however. I think roller skate events should be from anywhere in the world since there are so few. Similar for inline events. Maybe there can be even some US events in the skateboard section, but I think the skateboard section is bigger and therefore more Germany centric. Just apply some common sense. Did you see that you can enter events yourself?

No, I did not! I'll see what I can add.
There is a an event causing huge waves here
in the Texas inline world :
'Texas Skate Series'

5 separate events (Next one in Austin, TX on May 26th,) with an overall event winner comp on November 17th, at a location yet to be determined.
http://texasskateseries.wordpress.com/tag/texas-skate-series/